Error code
Infiniti All models code P0638
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Meaning
Throttle actuator control range/performance. The electronic throttle body actuator is not responding within expected parameters. On the Q50 and QX60, this code can trigger a reduced throttle response mode. Clean throttle body first; replace if fault returns
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Address of this page: https://www.remfixit.com/tr/infiniti/tum-modeller/p0638